public void RenderAtmosphere()
{
// blend between three standard textures depending on the time of day
if (nightSkyTexture != null && daySkyTexture != null && cuspSkyTexture != null)
{
float sunPositionX = (float)(SUN_ORBIT_RADIUS * System.Math.Sin(2 * System.Math.PI * timeOfDay / HOURS_PER_DAY));
float sunPositionY = (float)(SUN_ORBIT_RADIUS * -System.Math.Cos(2 * System.Math.PI * timeOfDay / HOURS_PER_DAY) + _sunOrbitYOffset);
float sunPositionZ = _sunOrbitZOffset; // offset from equator
float alpha = 1 - 4 * Math.Abs(sunPositionY - _sunOrbitYOffset) / SUN_ORBIT_RADIUS;
if (alpha < 0)
{
alpha = 0;
}
// first render the furthest
if (timeOfDay < 6 || timeOfDay >= 18)
{
Engine.Atmosphere.SkySphere_SetTexture(nightSkyTexture.ID);
Engine.LightEngine.set_EnableLight(_sunLight, false);
Engine.LightEngine.set_EnableLight(_moonLight, true);
}
else
{
Engine.Atmosphere.SkySphere_SetTexture(daySkyTexture.ID);
DxVBLibA.D3DLIGHT8 sunLight = Engine.LightEngine.GetLightByIndex(_sunLight);
sunLight.Direction = Engine.Gl.Vector3(-sunPositionX, -sunPositionY, -sunPositionZ);
float brightness = (1 - alpha) / 4F;
float ambient = 0.2F;
sunLight.ambient.r = ambient;
sunLight.ambient.g = ambient;
sunLight.ambient.b = ambient;
sunLight.ambient.a = ambient;
sunLight.diffuse.r = brightness;
sunLight.diffuse.g = brightness;
sunLight.diffuse.b = brightness;
sunLight.diffuse.a = brightness;
sunLight.specular.r = brightness;
sunLight.specular.g = brightness;
sunLight.specular.b = brightness;
sunLight.specular.a = brightness;
Engine.LightEngine.UpdateLight(_sunLight, ref sunLight);
Engine.LightEngine.set_EnableLight(_sunLight, true);
Engine.LightEngine.set_EnableLight(_moonLight, false);
}
Engine.Atmosphere.SkySphere_SetColor(1, 1, 1, 1);
Engine.Atmosphere.Atmosphere_Render();
// now render the cusp, weighted by timeofday
Engine.Atmosphere.SkySphere_SetTexture(cuspSkyTexture.ID);
Engine.Atmosphere.SkySphere_SetColor(1, 1, 1, alpha);
Engine.Atmosphere.Atmosphere_Render();
Engine.Atmosphere.Sun_SetPosition(sunPositionX, sunPositionY, sunPositionZ);
}
// render the atmosphere
Engine.Atmosphere.Atmosphere_Render();
}
public void SetSky(ITexture day, ITexture night, ITexture cusp, ITexture sun)
{
nightSkyTexture = night;
daySkyTexture = day;
cuspSkyTexture = cusp;
Engine.Atmosphere.SkySphere_Enable(true);
Engine.Atmosphere.SkySphere_SetRadius(1000);
Engine.Atmosphere.Sun_SetTexture(sun.ID);
Engine.Atmosphere.Sun_SetBillboardSize(0.5f);
Engine.Atmosphere.Sun_Enable(true);
DxVBLibA.D3DLIGHT8 sunLight = new DxVBLibA.D3DLIGHT8();
sunLight.Type = DxVBLibA.CONST_D3DLIGHTTYPE.D3DLIGHT_DIRECTIONAL;
sunLight.Direction = Engine.Gl.Vector3(1, -1, 0);
sunLight.ambient = Engine.Gl.DXColor(0, 0, 0, 1);
sunLight.diffuse = Engine.Gl.DXColor(1, 1, 1, 1);
sunLight.specular = Engine.Gl.DXColor(1, 1, 1, 1);
sunLight.Attenuation0 = 0;
sunLight.Attenuation1 = 0;
sunLight.Attenuation2 = 0;
_sunLight = Engine.LightEngine.CreateLight(ref sunLight, "sun", false);
_sunOrbitYOffset = 200;
_sunOrbitZOffset = 200;
DxVBLibA.D3DLIGHT8 moonLight = new DxVBLibA.D3DLIGHT8();
moonLight.Type = DxVBLibA.CONST_D3DLIGHTTYPE.D3DLIGHT_DIRECTIONAL;
moonLight.Direction = Engine.Gl.Vector3(1, -1, 0);
moonLight.ambient = Engine.Gl.DXColor(0.1f, 0.1f, 0.1f, 1);
moonLight.diffuse = Engine.Gl.DXColor(0.1f, 0.1f, 0.1f, 1);
moonLight.specular = Engine.Gl.DXColor(0.1f, 0.1f, 0.1f, 1);
moonLight.Attenuation0 = 0;
moonLight.Attenuation1 = 0;
moonLight.Attenuation2 = 0;
_moonLight = Engine.LightEngine.CreateLight(ref moonLight, "moon", false);
}
public void SetSky( ITexture day, ITexture night, ITexture cusp, ITexture sun ) {
nightSkyTexture = night;
daySkyTexture = day;
cuspSkyTexture = cusp;
Engine.Atmosphere.SkySphere_Enable( true );
Engine.Atmosphere.SkySphere_SetRadius( 1000 );
Engine.Atmosphere.Sun_SetTexture(sun.ID);
Engine.Atmosphere.Sun_SetBillboardSize(0.5f);
Engine.Atmosphere.Sun_Enable(true);
DxVBLibA.D3DLIGHT8 sunLight = new DxVBLibA.D3DLIGHT8();
sunLight.Type = DxVBLibA.CONST_D3DLIGHTTYPE.D3DLIGHT_DIRECTIONAL;
sunLight.Direction = Engine.Gl.Vector3(1, -1, 0);
sunLight.ambient = Engine.Gl.DXColor(0, 0, 0, 1);
sunLight.diffuse = Engine.Gl.DXColor(1, 1, 1, 1);
sunLight.specular = Engine.Gl.DXColor(1, 1, 1, 1);
sunLight.Attenuation0 = 0;
sunLight.Attenuation1 = 0;
sunLight.Attenuation2 = 0;
_sunLight = Engine.LightEngine.CreateLight(ref sunLight, "sun", false);
_sunOrbitYOffset = 200;
_sunOrbitZOffset = 200;
DxVBLibA.D3DLIGHT8 moonLight = new DxVBLibA.D3DLIGHT8();
moonLight.Type = DxVBLibA.CONST_D3DLIGHTTYPE.D3DLIGHT_DIRECTIONAL;
moonLight.Direction = Engine.Gl.Vector3(1, -1, 0);
moonLight.ambient = Engine.Gl.DXColor(0.1f, 0.1f, 0.1f, 1);
moonLight.diffuse = Engine.Gl.DXColor(0.1f, 0.1f, 0.1f, 1);
moonLight.specular = Engine.Gl.DXColor(0.1f, 0.1f, 0.1f, 1);
moonLight.Attenuation0 = 0;
moonLight.Attenuation1 = 0;
moonLight.Attenuation2 = 0;
_moonLight = Engine.LightEngine.CreateLight(ref moonLight, "moon", false);
}
